Salicylic acid alleviates mercury toxicity by preventing oxidative stress in roots of Medicago sativa

Zhou, Zhao; Guo, Kai; Elbaz, Abdelrahman Abdou; Yang, Zhi Min

doi:10.1016/j.envexpbot.2008.06.001

Cited by 210 publications

(80 citation statements)

References 53 publications

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“…Spraying the drought stressed plants of Lycopersicon esculentum with SA enhanced the activities of antioxidative enzymes SOD, APX and CAT and protected the plants against oxidative damage [36]. Treatment with SA alleviated mercury toxicity in alfalfa plants by preventing oxidative stress in roots and increasing the activities of NADH-oxidase, APX and POD [43].…”

Section: Discussionmentioning

confidence: 99%

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Surapu¹,

Ediga²,

Meriga³

2014

ABB

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The aim of this work was to evaluate the alleviating efficacy of salicylic acid (100, 250 and 500 μM) against the toxic effects of aluminum (Al) on two tomato cultivars (GOWRI and SIRI) differing in their sensitivity to Al stress. Al treatment (500 µM) caused 40% -80% drop in plant growth, relative water content (RWC) and cell viability and a reduction of 1 -2.5 fold and 0.5 -2 fold in glutathione and proline content respectively, when compared to their control plants grown in Al free medium. Al treatment also resulted in 2 -5 fold raise in malondialdehyde (MDA) levels, 2 -3 fold higher Al uptake and 55% -80% more electrolyte leakage and caused severe DNA damage. Al stress enhanced (1 -2 fold) the activities of superoxide dismutase (SOD) and peroxidase (POD), but decreased catalase (CAT) activity over their respective controls. Exogenously-applied Salicylic acid (SA) significantly (p < 0.05) and dose-dependently alleviated Al-induced toxicity in tomato seedlings as marked by much improved plant growth, retention of higher RWC, cell viability, glutathione and proline content. SA also caused 0.6 -1.5 fold reduction in Al uptake, 50% -80% less electrolyte leakage, 40% -80% drop in lipid peroxidation and considerable protection against DNA damage. Also, supplementation of SA could considerably reverse the Al-induced changes in the activities of SOD, POD and CAT. Together, our findings demonstrate that, SA is an efficient growth regulator with diversified roles that contribute to its potential alleviating effect against Al induced toxicity and SIRI is a relatively Al-resistant cultivar compared to GOWRI. * Corresponding author. V. Surapu et al.778

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Section: Discussionmentioning

confidence: 99%

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Surapu¹,

Ediga²,

Meriga³

2014

ABB

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“…These enzymes reduce Lipid peroxidation activity in germination stage,so increasesthe percentage of germination Increasing stress levels reduces the percentage of germination. This decrement salinity stress (toward drought stress) is disturbed due to Osmotic pressure, water absorption process and then alpha amylase enzyme activity is intercepted (Zhou, 2009). In one experiment it was found that germination rate of the seeds Prime (mulberry Fox plant) with salicylic acid under drought and salinity stress was greater than control treatment, but decreased by increasing the level of drought and salinity stress (Zares & Tavili, 2000).…”

Section: The Role Salicylic Acid In the Regulation Of Plant Physiologmentioning

confidence: 99%

Effect of Salicylic Acid Pretreatment on Germination of Wheat under Drought Stress

Sharafizad¹,

Nezami²,

Siadat³

et al. 2013

JAS

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Seed priming increases enzyme of antioxidants such as glutathione and ascorbate in seed. These enzymes decrease the activities of lipid peroxidation in stage of germination. As a result, increases the percentage of germination. The aim of this survey is to study the effect of the pretreatment of salicylic acid under the condition of drought stress on features of germination.This research is performed in December 2011, in laboratory of seed control branch of Khuzestan. Wheat seeds of Chamran cultivars were transferred to Petridish containing 10 ml solution of polyethylene Glycol (6000) with potential [0 ( control), -5, -10 and -15 bar] after soaking in solution [0 (distilled water, 0.7, 1.2, 2.7 mM] of salicylic acid for 24 hours for germination under the condition of drought stress.The result showed that the greatest impact of salicylic acid on reducing the germination time was at low level of stress. The highest percentage of germination and affecting traits on it was obtained byseed soaking treatment with salicylic acid with minimum amount (0.7 mM). the best result was obtained from low level of stress.The percentage of germination had positive and significant correlation with : average daily germination (0.988**), coefficientof germination rate (0.971**), length of radicle (0.363**), length of plumule (0.604**) length of seedling (0.765 **) and seed vigor (0.870**) and it has negative and significant correlation with: daily germination rate (-0.935**), germination energy (-0.7668**) and Allometric trait (-0.501**). More energy is required for germination in high density of SA and high level of drought stress, in addition, the time needed for germination will be more. Seed vigor and power index off seedling decreased in high density of SA and high level of drought stress.

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“…The reduced growth could be due to blocking of cell division or elongation (Patra and Sharma 2000;Zhou et al 2009). In addition, mercury triggers oxidative stress by inducing production of reactive oxygen species (ROS) and lipid peroxides in many plants (Cho and Park 2000;Cargnelutti et al 2006;Zhou et al 2007Zhou et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

Mercury-induced oxidative stress and impact on antioxidant enzymes in Chlamydomonas reinhardtii

et al. 2010

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Investigation of mercury toxicology in green algae is of great importance from ecological point of view, because mercury has become a major contaminant in recent years. In higher plants, accumulation of mercury modifies many aspects of cellular functions. However, the process that mercury exerts detrimental effects on green algae is largely unknown. In this study, we performed an experiment focusing on the biological responses of Chlamydomonas reinhardtii, a unicellular model organism, to Hg(2+)-induced toxicity. C. reinhardtii was exposed to 0, 1, 2, 4, 6, and 8 μM Hg in media. Concentrations of Hg were negatively correlated with the cell growth. Treatment with Hg induced accumulation of reactive oxygen species and peroxidative products. Endogenous proline levels increased in Hg-exposed algae. Hg exposure activated superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX). To get insights into the molecular response, a RT-PCR-based assay was performed to analyze the transcript abundance of Mn-SOD, CAT and APX. Our analysis revealed that expression of the genes was up-regulated by Hg exposure, with a pattern similar to the enzyme activities. Additional investigation was undertaken on the effect of Hg on the transcript amount of ∆(1)-pyrroline-5-carboxylate synthetase, a key enzyme of proline biosynthesis and on that of heme oxygenase-1 (HO-1), an enzyme regulating heavy metal tolerance. Expressions of both P5CS and HO-1 were up-regulated by Hg. These data indicate that Hg-induced oxidative stress was responsible for the disturbance of the growth and antioxidant defensive systems in C. reinhardtii.

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Salicylic acid alleviates mercury toxicity by preventing oxidative stress in roots of Medicago sativa

Cited by 210 publications

References 53 publications

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Effect of Salicylic Acid Pretreatment on Germination of Wheat under Drought Stress

Mercury-induced oxidative stress and impact on antioxidant enzymes in Chlamydomonas reinhardtii

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